If he existed then he was just one among many pretenders with DG.
At any one time there are 1000s probably 100,000s who think they are Christ, God, Elvis, Elijah etc etc and something is "special" about them. It has been the same all thru the ages. Mental illness and religion always go hand in hand.
If Jesus (or anyone) could do the things his cult followers later said he could do then the Romans would have taken an interest and had it written down multiple times and we would still have the records to this day.